For the moment it is being developed for 3DGE (EDGE 1.36) but I probably will be doing a ZDoom version as well.
screenshots:
Spoiler:The weapons are almost done, say for a few tweaks and such. They are as follows
1. Fists
1. Big blade
2. Revolver (primary and secondary attacks)
2. Dual revolvers
3. Winchester rifle (primary and secondary attacks)
4. Sawed-off shotgun (single-barreled)
5. Double-barreled shotgun
6. Sticks o' dynamite (primary and secondary attacks)
*7. Gatling gun (primary and secondary attacks)
8. ? (a BFG replacement)
* the player can not walk around with this weapon selected
Also there will be a few new enemies introduced along with some other surprises.
Coming when it's done.
First public beta: http://www.mediafire.com/?x4uvumumsnl76n1
You will need EDGE 1.36 (3DGE) and you need to load both WADs (in which order should not matter).
Keep in mind that this is far from finished, but I feel it is enough to show off.
Enjoy, any feedback would be appreciated.